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问题 单项选择题

喂丝机进料计量管，高低料位（）误检测或光电管接触不良、损坏，造成不喂料或喂料断续，造成喂丝流量不均匀。

A.行程开关

B.光电开关

C.速度开关

D.超声波传感器

答案

参考答案：B

完形填空

About 6 years ______________ (pass) since the earthquakes happened in Wenchuan.

小题1:After such a long walk, he’s too tired to walk any ______________ (far).

小题2:Chinese-style road crossing is a bad habit and it _______________ (not allow) now.

小题3: ---Excuse me, look at the sign. It says “No smoking”

---Sorry, I ______________ ( not notice) the sign.

小题4:People say that______________（eat）an apple a day keeps the doctor away.

小题5:It is reported that Malaysia Airlines ______________ (fly) MH370 changed its airline before it disappeared.

小题6:October 1 is grandma’s ______________ (90) birthday.

小题7: To the old, the most important thing is not to get lots of presents, but ______________ (communication) with their children.
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选择题

There's a rumor________that he is going to resign.

A．in the air

B．on the air

C．into thin air

D．in the open air
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